javascript将数组的元素自己转换为数组

Question

How can I convert the elements of the array into another array?

let a = [2, 4, 0, 8, 9, 15]

and the result will be :

a = [[2], [4], [0], [8], [9], [15]]

Answer 1

Use Array#map to iterate the array, and wrap each item in an array:

 let a = [2, 4, 0, 8, 9, 15] const result = a.map((n) => [n]) console.log(JSON.stringify(result)) 

Answer 2

let a = [2, 4, 0, 8, 9, 15];
let b = a.map((item) => [item]);

Answer 3

    a = [2, 4, 0, 8, 9, 15]
    console.log(result = a.map((n) => [n]))
    b=[]
//you can try  below also
     for (i in a){
      b.push([i]);
      }